临汾盆地地热的形成机制及开发利用

Formation Mechanism and Exploitation of Geothermal Heat in Linfen Basin

为了开发利用临汾盆地内的地热资源,通过开展水文地质测绘、遥感解译、综合物探测量、地热钻探、水质分析,基本查明了区内地热异常的分布范围、热储层结构、埋藏深度、地热流体储存量及质量。对该区地热资源形成机制进行了初步分析研究。临汾盆地地热田受基底深大断裂控制,地幔上隆导致裂谷中大地热流值增高是其主要热源,巨厚的新生界松散物是良好的保温盖层。第三系地下热水温度在41~50℃,按地热流体温度分类属低温型;第三系热储层埋藏深度主要介于890~2000 m,为经济型地热资源。综合分析认为临汾盆地属于第三系低温热水型地热田。对该区地热资源形成机制进行研究和开发利用,并以该区地热开发为示范点,辐射周边地区,对提高当地人民的生活质量具有重要意义,并将为其他地区开发第三系地下热水提供经验。

In order to develop and utilize the geothermal resource in linfen basin,through the development of hydrological geological mapping,remote sensing interpretation,comprehensive geophysical survey,geothermal drilling,water quality analysis,the distribution range of geothermal anomalies,thermal reservoir structure,burial depth,geothermal fluid storage and quality in the area had been basically found out.The formation mechanism of geothermal resource in this area was preliminarily analyzed and studied.The geothermal field in Linfen Basin is controlled by deep and large faults in the basement.The increase of terrestrial heat flow in the rift caused by mantle upwelling is the main heat source,and the thick Cenozoic loose material is a good thermal insulation cap.The temperature of geothermal water in Tertiary system is between 41℃and 50℃,which belongs to low temperature type according to the temperature of geothermal fluid;the buried depth of Tertiary system thermal reservoir is mainly between 890 m and 2000 m,which is an economic geothermal resource.Comprehensive analysis shows that Linfen Basin belongs to the low temperature and hot water geothermal field of Tertiary system.The research and development and utilization of geothermal resource in this area,taking the geothermal development in this area as a demonstration point and radiating the surrounding areas,is of great significance to improve the quality of life of local people,and will provide experience for the development of tertiary geothermal water in other areas.